When to invest in marketing
briefmix.com
briefmix.com
Advertising is an assumed cost of business for any medium to large company these days, but I feel there's a growing silent minority who slowly believe, slowly know, that advertising in the online space is unfeasible for a majority of products. Advertisers like google make so much money because online advertising is one of those things that is super easy to keep throwing more money at. I wonder how many companies would benefit from entirely ditching online advertising and pursue alternate methods like direct outreach or sponsored content.
We might see 4,000-10,000 advertisements a day[1]. Do you remember two advertisements you saw today? Mere-exposure effect is the only thing going for it. Which may be fine if you're Coca-Cola, not so much if you run an online clothing store.
[1]https://webtribunal.net/blog/how-many-ads-do-we-see-a-day/#:....
are you talking about b2b?
I don't know what you have in mind. Sounds like you are suggesting companies should start calling me or knocking on my door instead of puting ads on google search results. That doesn't sound great.
If you're selling commercial products for a mass market, I think doing things like sponsored content might be more effective.
If I'm selling products to businesses or a few customers, it's better to do outreach by attending industry events, talks etc... I think the cold approach still works.
"Good" marketing, for a B2C company, is often defined as a 3x CAC/LTV ratio and 12 month payback. That means for every $1 you spend on advertising you make $3 in gross profit, and you get back $1 after 12 months. This is fairly healthy for many businesses, but some businesses may be looking for a 1 month payback, or may be looking for a 5x LTV. It's also possible to trade off LTV and payback, the latter may be more important for a fast growing business so that they're not tying up capital, and they may not yet have enough data to accurately predict 3 or 5 year LTV anyway.
In reality though these things fluctuate all the time, you may have 2-5 marketing channels at a small company (e.g. FB, IG, Adsense, YT, direct mail, out of home, etc), of which some will be better and others will be worse, and you blend them together, changing proportions over time as channels change in effectiveness or cost.
"CAC" stands for "Customer Acquisition Cost." It represents the cost a company incurs to acquire a new customer, including all the costs associated with marketing and advertising.
"LTV" stands for "Lifetime Value." It represents the total net profit a company expects to earn from a customer throughout their entire relationship with the company. This takes into account all the revenue a customer will bring to the company minus any costs associated with serving that customer over their lifetime.
This seems subtly wrong from what I remember (though it's been like 6 years).
Gross profit not net profit.
Lifetime is "lifetime", you set a cap in years, it's not really the "entire relationship".
The latter one isn't as big of a deal because it gets stupid hard to track/measure that long anyways, but the former one is a pretty big deal.
e.g. If I buy $100 of ad views and over all of those ads get 10 new customers, then my CAC is $10. If a customer on average spends $100 over their lifetime (typically defined as 3 or 5 years, but varies per business) on orders that cost me $70 to fulfil, then their LTV is $30 (Edit: as marketing is not included in gross profit).
The LTV is in terms of gross profit not net profit. It's the revenue minus the direct cost of fulfilling that revenue (cost of goods sold), so it would include: products, shipping, packaging, payment fees, staff time for handling, etc. It would not include: marketing, customer support (surprisingly!), R&D or creating the product, fixed costs such as offices, staff, etc.
I'm not quite sure what the best practice is on accounting for salaries of the marketing department. I think you wouldn't typically include full time employees managing marketing channels, but if you outsourced marketing to an agency you probably would account for the all-in cost to acquire customers via the agency, as they are almost their own marketing channel in a way. It really varies though, and I could be wrong on the best practice here.
It makes more sense if you think about it as a function that turns CAC into LTV.
I am not sure about whether the metrics above are benchmarks for CAC based on advertisement alone.
Some products (B2C) are marketing heavy. Others (B2B) are sales heavy. But they both get included
Add the cost of your sales and marketing and divide by the number of deals during that time to obtain CAC.
Then you can calculate both LTV/CAC and CAC payback.
Per channel attribution is of course far more difficult, depending on the channel.
Yeah, that’s definitely false. At best 100+.
> We only register under a hundred. And we pay conscious attention to even fewer.
All these things are considered by marketing departments, and while they might not always be explicit advertising, they do the same thing, building a brand image, associations, and mindshare.
I'm sitting on my sofa and I can see 26 things that could be considered adverts, and my TV is off.
Edit: >30. I haven't moved, just realising what a capitalist hellscape I live in. Thankfully my laptop stickers are facing away from me.
Jesus.
(That’s not to say everyone should be spending money on ads, that currently spends.)
Thank god for adblockers and pity those who do not have one or do not know firefox on android still allows them.
In my opinion, thats a good thing for the majority of the population. Those who do not care about ads and tracking makes it so evasion still possible (to some extent)
It is a misconception that ad blockers significantly impact the ad market as a whole, obviously they impact Google and web advertisers though.
Also I really like the given email:
nosupport@revanced.app
Makes it clear what not to write them (but I bet many still do).
Maybe I’m in the minority, but I absolutely despise advertising. The only advertisements I ever remember are due to hating them more then the others for some reason- like being even more aggressive and in my face. There has to be some tipping point where advertising does more harm for the advertisers then good.
This is like the most insane comment I've ever read
That being said I don't mind a well targeted technical advertisement e.g. trade magazines, new electronic components, and so on.
On a less passive level the company my dad used to work for basically made a living selling marketing lists of people who they'd confirmed (via voice) were genuinely looking for (say) new solar panels.
I used to not mind them, feel like people were just supporting their sites, etc., but I was eventually pushed over the edge, lost it, and stopped using apps with ads I couldn't block, and started using uBO everywhere.
(And stopped reading news because it's almost as bad for you as advertising.)
So let's just call it my inability to see ads without feeling angry, and so I need a "psychological exemption". :)
Since I'm just one of a few out there who does this, I figure content creators will survive.
(I, too, am a content creator, but I distribute mine for free without ads. I make money with my day job.)
In my experience, many of us on HN have just disallowed FB & Google to really hone in on our needs and likes (ad blockers, disallowing cookies etc) so we see crap ads all the time. But many people I know don't do that, hence their ads are really about stuff they want to see and they don't mind the ads as much.
As an example, I now see many ads about new video games and new fine dining restaurants in my city. And I love that (compared to the other crap I often get). Because it lets me stay updated on new games and gives me inspiration on what I can cook.
So again, all ads are bad ads for everyone until they actually resonate with you - you might just haven't had one of those yet!
For an e-commerce business the goal is what's called conversion, which is when a user makes a product purchase. The margins on conversion vary by product and product segment. At that time most people came to travel sites to book airfare and the travel sites just basically resold what the carriers had on their own sites plus a $7 service fee charged by the carriers. Hotels were more lucrative averaging a margin closer to $50 per purchase. Travelocity had figured out some pricing algorithm that dominated the industry for packages where packages were flight plus hotel and optionally rental car. I can't remember the margin for Travelocity packages but I want to say it was around $300 per purchase.
The problem with conversion on e-commerce sites is time. The more expensive the product the more time the user will spend investigating a purchase. The more they will hop between various different competing web sites. Air purchases had a time realization of a few hours, hotels about a week, and packages were about 3 weeks. That means you do anything to induce increased conversion it will be 3 weeks before you should expect to see money in the bank, which complicates analysis of what went right and what went wrong. This means A/B testing becomes supremely important.
Ad spend was the opposite across the board. Ad spend would always bring tremendous traffic to the site but almost never would it increase conversion. However once you have eyes on pages you can generate revenue by other means such as affiliate programs and certainly with ads on your own site. The most amazing thing about ads whether they bring people to your site and cost you money or they are on your own site and generate you money is that the money spent/realized occurs in real time. Suddenly your analysis becomes stupid simple.
Ad traffic is dirty traffic though. Ads that cost you money rarely increased conversion and ads on your own site substantially detracted online traffic, by as much as 15% in a near term and much more gradually over a longer time horizon. The margins on ads is next to nothing so the more you invest in it the more you must invest in it to justify the both the spend and decreased traffic volume. This is what I would refer to as a drug addition. They had an immediate high, it was killing their business, and they only knew how to increase ad participation. Toxic.
Thanks to uBlock, Newpipe and the like, I generally see less than two advertisements a week.
We ran some legit experiments with ads, where we didn’t just count ppl who saw the ads then later converted (how Google, FB, etc. want you to “measure” impact), we compared them to actual control groups. We did find most types of ads to not be worth the $$.
However, remarketing did seem to be worth it, at the time, for us. This is when you generate interest in your product through other avenues (organic content marketing, organic social media marketing, PR, attending industry events, etc.), then when ppl show some interest in your product (visit your website), but don’t convert, you cookie them and keep showing them ads all around the internet. These ppl are already legit interested, they’re gonna pay more attention to the ads, and keeping your product top of mind can be enough to get them over the line to conversion.
https://www.youtube.com/watch?v=x8iXj2vkpJI
You will remember at least one...
If you're selling expensive B2B solutions the customer journey will look very different to a consumer product - direct ads might be a terrible idea because no business clicks on a facebook ad and then decides to invest in an expensive enterprise software.
You might be better off investing in content, make a custom landing page for that lead, account based marketing etc - and not do any AdSense.
But yes, you do have to evaluate your marketing mix and channels against your customers purchase journey. Will write more about that in the upcoming posts :)
If you have just designed an AI-powered robot for welding propane tanks, you won't get a single lead via AdWords. Your best bet is trade shows and sales people who know people inside companies that need to weld propane tanks.
This just doesn't pass the smell test for me. Places that are smart enough to have raised/made $1.5 MM just for marketing are generally smart enough to roll it out slowly, track conversions, and be adjusting ad content and ad placement along the way. You know, the absolute basics -- "AdWords for Dummies".
This makes as much sense as saying that a company spent $1.5 MM on five engineers for a year without a single line of code ever being written.
About 2 years later, he left the company. Very few - if any - customers were generated, but there was a sizable Google Ads spend.
I think the business owners had quite good luck with hiring talented people and letting them get to work, fairly hands-off. The guy spoke well and could quote many marketing gurus. I never found what he said to be particularly useful for the company, but I assumed he was getting results since someone was keeping him around.
I believe many owners of successful businesses have blind spots and need people they can turn to fill them. Sometimes that goes poorly.
Right now I’m fixing a similar snafu where I’m halving a not-insignificant AWS monthly bill for a company due to an ‘expert’ doing something very expensive. Like, 2 weeks of work will cut many developers annual salaries worth of AWS spend a year. Sometimes you get bad advice and you’re growing & making enough money that you can ignore the seemingly huge inefficiencies.
> This makes as much sense as saying that a company spent $1.5 MM on five engineers for a year without a single line of code ever being written.
I mean, if you change this to ‘functional line of code’ or ‘usable line of code’ I have definitely seen that occur with one or two developers over my career.
I don’t think it’s the norm, but I do think it happens.
I spend $100 a month on Ads for a physical business and get 1 or 2 people in the door a month who tell me they saw my ad.
Can I get $10 mil in VC funding now?
The article mentions a bad choice (not by the author) but moves on to talk about how to make better choices and never talks about the mistake again.
Did you read past the first paragraph?
I struggle to see how one could read the article to the end and walk away with that sentiment.
They give an example that their conversion rate on their website is (cue some heavy math /s) 0.16 % so if they want to acquire X customers they need to bring in Y traffic.
But of course anyone who has done even the most basic user acquisition knows that the way you achieve a visitor to your site is more important than the visitor. Customers who show up organically have a vastly higher conversion rate than the randos who show up from your ad, in fact many of them probably aren’t even going to be real so your conversion rate is going to nose dive as soon as you start using paid acquisition. Happens every time.
The problem with adding segmentation for more accurate calculations is there's always one more person who can sneer it's inaccurate because there wasn't enough segments. This type of person tends to move on from marketing / data science quickly, real world constraints are very frustrating to them
As soon as you turn on a torrent of paid traffic conversion rates go to shit. So your old conversion rate doesn’t work anymore and is just a random number that is an upper bound on your new conversion rate.
Overall, when setting objectives it is still very important to have some numbers to target - you can even change these targets later if it turns out there is a better way of getting those 1066 customers.
Your conversion rate is a function of the traffic. You can’t change the traffic without impacting the conversion rate.
I would estimate that you might need 10-1000x the traffic depending on the quality of the traffic in your paid campaign, so these aren’t little numbers these are huge oversights.
Doesn't even matter whether you have PMF, you can just use the direct feedback: ad was on for two weeks and nobody showed up, let's stop and think.
I've run little web shops and you always get some kind of interest. It might not pay back, but you wouldn't get zero.
The problem for them was mainly that the agency running their ad account counted "demo requests" as their top metric and mistakingly counted all demo requests that came in as attributed to the marketing spend. So they reported on faulty numbers during the entire year. Hubspot showed that direct ads actually didn't work at all (mainly because they didn't really have PMF yet). Needless to say, that agency got fired pretty quickly.
I just looked up what I spend on Google Ads for a small campaign on SQL/AI related keywords for https://aihelperbot.com:
- $699.95 (part of a spend $400 to get $400 deal)
- 244K impressions
- 3.68K clicks
- 15 conversions
The conversions where "Begin checkout" events for a free trial period (I now run free tier). I don't know how many actually end up paying or cancel the free trial within the first week. Was it worth it? No. But I would consider advertisement once I reach a bit higher revenue. I talked to multiple newsletters who cater to my customer segment but it is still too expensive for since I am bootstrapping myself.
I don't think many people understand just how much active management these things take. New ad content is needed all the time, new testing needs to be done, ad channels change in cost and effectiveness month to month and need balancing appropriately, targeting needs to be reworked.
You almost never hear management talk about near misses. "We were going to buy that giant ERP for X millions but we did a weekend of reading and found out the vendor was two guys' etc etc.
This sort of waste has the risk of wrecking a business, putting multiple jobs and lives at risk etc. Yet, if some pleb on the shop floor is wasteful with company material or time, consequences almost instantly follow. It'd be great if this ended with, and then we made the money back by sacking the marketing team and hiring one person who had a clue.
Not all campaigns are created equally. Running a bad campaign and then opining about marketing in general is like buying a single car off craigslist and then remarking on the features of a new Maserati.
But I've realised I might have to write a separate post just about this specific incident and what we did to bring the spend and results back on track!
I happened to mention this to someone in marketing at my company, and he said buying ads for a single product like that rarely works. Advertising is useful if I can direct potential buyers to a shop where I have a variety of art goods. Then the next time they need something art-related, they might visit my shop. But selling just watercolor kits I was better off making YouTube videos, making posts on Reddit, etc. My CPA was something like $35, and I was selling the kits for $29.99. I ended up selling them to friends and family, and giving a few as birthday gifts.
How they got there is: They didn't set up analytics and ramped up ad spend way too fast.
But I've realised I might have to write a separate post just about this specific incident and what we did to bring the spend and results back on track!
Also, I'm just describing how I was taught to market stuff - I've worked with a wide array of startup and Fortune 500 companies and it has been quite formulaic for all of them. But obv there are more than one way to do so. I'm actually a developer now so don't do any consulting any more - merely writing this down for my own record and if it can help/inspire anyone else :) Thank you for reading!
Now that's a story I'd like to hear.
I've realised I might have to write a separate post just about this specific incident and what we did to bring the spend and results back on track. Thanks!
Marketing your product is placement. Was the product placed in the proper market, at the time where it would receive the most eyes? Was the product placed in the proper segment of the market? Was the placement during a time where the market was slowing?
Ads are only a tiny portion of marketing. The where, when, and how of marketing are just as -or even more- important for success.
Also, I'm a developer now so don't do consulting any more.. Merely writing this down for my own record and if it can help/inspire anyone else so not looking for free advertising. But thank you for reading!
Sure spend 10k, if you don't see results, try something else.
I assume they have customers from elsewhere, so they must have a clue who their customers are.
I don't really get the venture capital model anyway. If my business is anything like anyone elses, it takes a few years to find out what actually works. You don't need millions to find that out, and you don't need millions in marketing until you've actually found that out.
As it is this is a story of a company not knowing what they're doing pouring 1.5m down the drain, and still don't know what they're doing.
uber - https://news.ycombinator.com/item?id=25623858
airBNB - https://www.wsj.com/articles/airbnb-says-its-focus-on-brand-...
I'd hire an affiliate marketer who built their own website and grew traffic to make some money over the average VC backed marketing exec. Same goes for most big corporate marketing types, their skillset is worthless for a startup. Any person who has made $1 online from scratch would be better
> This is why accelerators like YC prefer cold outreach / emailing prospects during the early days of your company - it's free.
It’s not free.
I’m not sure what the rest of the article says but if the rest of it is as good as the beginning…
Of course the calculations if someone's throwing enough money at you that you can throw away 1.5m on marketing without results.
If you want someone else to do it, it costs you money.
Managing ad campaign takes time too.
So is “how much could I earn in the same amount of time if I did something else?”
It may not be strictly direct but it sets bounds around the value of your time.
You could do cold outreach, or you could put yourself out on Uber or task rabbit and then put that money towards an ad campaign.
...it also presumes that any of that is actually realistic; I wonder what TaskRabbit's ToS is like re: confidentiality, for example.
"Hey TaskRabbit, pls develop my marketing strategy for my stealth startup, thanks!"
I wasn’t suggesting to use taskrabbit for marketing strategy. I was suggesting you look at the taskrabbit rate for a handyman and consider that something like the price floor for your hourly rate. That or Uber driving. Can you net $20/hr driving Uber? Ok, then you can drive Uber for 7 hours and then spend 2hr allocating that money to google ads. That’s the lower bound alternative to doing cold outreach.
You don’t need high accuracy to set bounds, and I don’t see how managing people is a factor.
It seems to me like the reasons you gave were based on your misunderstanding of the idea.
Maybe it is an abjectly terrible way to estimate the value of your time. Estimating the cost to send an email to be zero is worse.
What you'll find is that the "cost" reference is to a payment made, not to an estimation of time value. In this sense, "sending an email" does cost $0.00, as you can do it without paying, for example, Google.
First of all, why EOY? And where does that 8m number come from? It just seems so arbitrary. Why not set growth direction with some lower boundary, and have simple guidelines like "If you do X, you will probably slow customer acquisition, so avoid X when makes sense" and "If you do Y, you will probably speed up customer acquisition, so try to do Y when makes sense".
You're free to use ranges in OKRs if desired.
Identifying rules / guidelines are "not even wrong" when writing OKRs, OKR = Objective + Key Result(s) usually a sentence each, in bullets.
It's better to focus on setting goals separately from setting rules, and humans being humans, you can't really identify a full set of rules that will prevent each and every form of unintended consequence
(also, note this is just fermi estimates in a blog post for a marketing consultant, they're focused on laying out a hypothetical, theres all sort of layers and interactions in a business)
A couple problems.
1. This is just terrible advice.
2. Not all marketing is flashing rectangles. E.g. industry trade shows.
Marketing is a two way process you should start right away -- "before starting", actually.
Marketing is understanding your market: who wants your product, who uses it, who decides that it should be used, and who pays for it (sometimes four different people), both at the micro (individuals) and macro (demographics, market lifecycle ("crossing the chasm"), external factors (changing environment)). And then why -- what matters to them? And only later in the process do you start to think of how you might reach them -- ads? What kinds? What tone do you set?
At the very beginning you want to get some idea of 1- would anyone at all actually ever use this and 2 - how many o of those people will there be on day 0 and how many in a few years?
The other thing you learn is how to design your product: what features actually matter, and for my SaaS how big a back end infrastructure will I need -- with multiple answers like in the first year and when it's time to scale. Lets' you design a small product with affordances for later, revenue-funded changes to make it scale. You don't need K8s on day 0, maybe never, or maybe someday so you design your MVP without supporting k8s but with it in the back of your mind. This all comes from marketing.
Many years ago I raised a $20MM A round (when $20MM was a lot of money and there were rarely seed rounds and no "pre-seed" nonsense) on a powerpoint-deck-only plan with no TAM $ analysis at all. It was a drug, and I knew (from talking to doctors and patients) that on day 0 people would pay thousands, and their doctors could sell it to them (specific market where that was the case). Then I had a slide talking about demographic trends (aging baby boomers). Because the marketing was so compelling the investors did their own TAM in their heads.
I mention that not because I think you should ignore TAM! But in my case TAM $ was impossible to calculate; OTOH I had enough market data (and the one VC who did some DD doing his own survey confirmed it, to his surprise) that I knew enough about the market to be able to talk about how I could steer (as much as you can in the pharma business) as certain numbers turned out to be wrong.
Starting with advertising is like choosing what kind of car to shop for by color.
Bud Lite sent cans to multiple influencers as part of a larger campaign, one of whom happened to be a trans woman. They didn't spend millions of dollars on this campaign; they didn't try to sell these cans; they were just commemorating (in a corporate-y way) an influencer they did a brand deal with.
It's sad how much hate you have toward someone for simply existing. Why do you feel the need to bring it up when it's completely irrelevant?
however from a purely non-emotional place it would be reasonable to point out that losing a million dollars to ads and not getting a sale is or is not a better or worse result than another marketing campaign that spent less than that and instead of getting zero dollars in sales caused a loss 300 million (I think that's the last number I saw, and does not include stock losses / brand devalue-ing) in sales.
I think it's unfair to to say someone has hate for someone else without knowing, and to assume it's for 'simply existing' - the BL situation for most people caught up in it is not that I believe.
I agree it may be sensitive to bring it up, but considering this is about marketing and such it's completely irrelevant - although I believe the discussions on this piece would be fine without it.
This post was about how marketing can't fix a bad product. Bud Lite had a product people liked, and marketing caused people to turn against it.
You can bring up the Bud Lite situation in conversation and have a genuine conversation about it. But this is such a stretch, out of nowhere, that I think it's safe to assume the intentions of this person.
marketing loses sales = company loses money
Company loses money = company, cuts jobs
Bad marketing kills companies.
Bud Light did negative billions from their campaign. These people did negative millions for their company. Comprende?
Not everything is about LGBTQ bullshit get over yourself
But you already know that.
> I once joined a company as a consultant - in the previous 12 months, they'd spent their entire $1,500,000 marketing budget on Google/Facebook ads. Using Hubspot we could track leads through the funnel and look at exactly how many customers this money had generated. The answer was 0. In total, the ads brought in two leads to the website who never even booked a demo for the product. For $1,500,000.
I would posit that this isn’t entirely true. This is what Hubspot saw, but ( unless they’re doing really scaled Account Based Marketing) they’re going to miss non-click signals in the funnel and misattribute results.
I’ve done a ton of B2B SaaS marketing over the last ~18yrs and most (>70%) of the marketing ROI comes from reaching your target accounts at scale - and they never fill out a lead form. Instead they respond to your sales team that has already reached out, resulting in sales taking the credit. I’ve quantified this effect several times now with a number of companies so I’m quite confident in it.
That said, it doesn’t mean the company he cites was doing great - far from it! They definitely needed to get their house in order and spending $1.5mm was clearly not the right path. Was it zero effectiveness? Unlikely. Was it really effective? Absolutely not.
> But how do you know if your business is ready to invest in marketing? To answer this question, you'll need to understand if your company have some form of product market fit - PMF.
Agreed. I typically warn clients that are early on in their growth journey to focus on product led growth, start a referral program (I end up doing that a lot) and get their organic growth in order. Paid ads should be an amplifier on a strong foundation, not the foundation itself.
> If you don't have any PMF, don't invest money in marketing - you might end up like the examples mentioned in the introduction.
It’s less about not investing and more about being smart. Referrals are great and low cost, investment in SEO early on - those are where to put the energy. They are great ways to accelerate your path to product market fit without burning excessive cash.
> How did we arrive at this number? As a rule of thumb, the pipeline in startup SaaS businesses usually comes from: > > - Marketing: 40% > - Cold-outreach/sales: 40% > - Partnerships: 20%
Just like my own experience with the ratio of B2B SaaS conversions from leads vs. sales outreach through paid, be very careful here ascribing a rule of thumb to your business. I’ve seen companies with very different mixes of sources, all very healthy. Your business may see greater opportunity from marketing and nearly zero lift from sales, so don’t assume this is a metric to shoot for.
Overall, I enjoyed the article and I’m glad to see that despite the clickbait-y title it was a more levelheaded read.
The problem for them was mainly that the agency running their ad account counted "demo requests" as their top metric and mistakingly counted all demo requests that came in as attributed to the marketing spend. So they reported on faulty numbers during the entire year.
Hubspot showed that direct ads actually didn't work at all - there were only 2 identified leads (who downloaded some ebook) and the rest were anonymous users. Hubspot cookies them so if they would have gone on to get a demo, a trial or become customers, we'd know. They didn't insanely enough! We could also check IP ranges of companies visiting through ads, and they were not signed up as customers at any point.
100% agree that organic / product led growth is the way to go in the beginning. I should probably reword the article and say to not focus on "Paid" marketing - you still want to start thinking about organic etc. Thanks!
Oh man, that’s going to give me nightmares…
Re Hubspot: they’re going to miss people that see the ad and don’t click. That’s the lift I’ve found to be highly effective, if a pain to quantify.
Thanks for responding and I’m glad you posted the article